Free Standard Shipping on $50+ Orders
free returns. buy with confidence
Heatbounce is here   shop now 🔥
tilenew | color:black
4.8
Rated 4.8 out of 5 stars
220 Reviews

HeatBounce conditioning heat protectant

The future of heat protection
OR

Description

This leave-in conditioning heat protectant detangles, softens, and delivers deeper heat protection than ever before*—for 85% less breakage after blow drying*.

*k18hair.com/disclaimers

Apply throughout sectioned hair, brushing through to help with even distribution. Use on towel-dried hair before blow drying and on dry hair before hot tools.

resilicore™ heat-shielding technology is inspired by proteins in nature that can withstand extreme temperatures. Unlike traditional heat protectants that only coat the cuticle, the size + molecular makeup of resilicore™ allows it to penetrate deeper than ever before*, into hair's inner cortex where heat damage can occur, forming a protective shield that fortifies from within.

Conditioning blend conditions, softens, and detangles even damaged hair

Created for all hair types + textures. Can be used on extensions.

*k18hair.com/disclaimers

Protects from heat up to 450°F

85% less breakage after blow drying*

* Lightweight formula conditions, softens, and detangles even damaged hair*

Water (Aqua) (Eau), Cellulose Gum, Isopentyldiol, Propanediol , Cetearyl Alcohol, Isopropyl palmitate, Sodium Benzoate, C13-15 alkane, sh-Oligopeptide-78 s-Fruit Fly Oligopeptide-1, (sh-Oligopeptide-78 s-Fruit Fly Oligopeptide-1) Peptides, Laurdimonium Hydroxypropyl Hydrolyzed Barley Protein, Helianthus Annus (Sunflower) Seed Oil , Oryza Sativa (Rice) Bran Extract, Helianthus Annuus (Sunflower) Extract, Rosmarinus Officinalis (Rosemary) Leaf Extract, Tocopherol, Behentrimonium Chloride, Brassicatrimonium Chloride, Gluconolactone, Arginine, Coco-Glucoside, Lactic Acid, Cellulose, C12-20 Alkyl Glucoside, Citric acid , Potassium Sorbate, Benzyl Alcohol, Isopropyl Alcohol, C14-22 Alcohols, Fragrance (Parfum), Amyl Salicylate, Benzyl Salicylate, Citronellol, Citrus Aurantium Peel Oil, Dimethyl Phenethyl Acetate, Geraniol, Geranyl Acetate, Isoeugenyl Acetate, Limonene, Linalool, Linalyl Acetate, Pinene, Tetramethyl Acetyloctahydronaphthalenes, Vanillin.

pairs well with
bestseller
full-size leave-in molecular repair hair mask
4.7
Rated 4.7 out of 5 stars
8,263 Reviews
4-minute leave-in treatment to reverse hair damage
new
AstroLift™ reparative volume spray
4.5
Rated 4.5 out of 5 stars
235 Reviews
Interdimensional biotech reverses bounce-depleting damage for 2-day hold

Description

This leave-in conditioning heat protectant detangles, softens, and delivers deeper heat protection than ever before*—for 85% less breakage after blow drying*.

*k18hair.com/disclaimers

got questions?
Get started here
No, HeatBounce does not need to be activated to protect from heat.
No, you can blow dry or use hot tools immediately after applying HeatBounce.
HeatBounce is powered by resilicore™ heat-shielding technology, an innovation inspired by resilin—a natural protein that can withstand extreme temperatures. Unlike traditional heat protectants that only coat the outside cuticle layer of hair, the size + molecular makeup of resilicore™ allows it to penetrate deeper than ever before*, into the cortex where heat damage can occur, forming a protective shield that fortifies from within.

*k18hair.com/disclaimers
While the molecular repair hair oil and HeatBounce have heat protection benefits, HeatBounce defends against heat from the cuticle to the cortex*, going as deep as heat damage goes to help protect against color fade, dry feeling, dullness, and breakage. The oil delivers traditional heat protection on the outer layers of hair and clinically proven damage repair. *k18hair.com/disclaimers
After shampooing, apply the K18 mask (wait 4 minutes) or DAMAGE SHIELD conditioner. Then, apply HeatBounce and AstroLift™ before blow drying or air drying. Use HeatBounce again before any hot tools. Finish with K18 oil and use AirWash™ to refresh hair between washes.
Apply HeatBounce every time before you apply heat, including if you switch between blow drying to hot tools.
 the future of heat protection
0
less breakage after blow drying*
0
degree heat protection from cuticle to cortex*
heat protect + condition in one step
how to use HeatBounce
1. Apply throughout sectioned hair, brushing through to help with even distribution.

2. Use on towel-dried hair before blow drying and on dry hair before hot tools.
feel what's possible with K18
See how K18 unlocks our community's expression
4.8
Rated 4.8 out of 5 stars
Based on 220 reviews
220 reviews
  • Jocelyn A.
    Verified Reviewer
    Reviewing
    HeatBounce conditioning heat protectant 4oz
    I recommend this product
    Age 25 - 34
    Hair Concern Color-care, Frizz, Heat damage, Dryness, Split-Ends
    Hair Type Thick/Coarse
    My Results Less Breakage, Less Frizz, Visible Difference, Stronger Hair, Soft Touchable Hair
    Rated 5 out of 5 stars
    3 hours ago
    RESCUED MY BLONDE balayage!!

    I was gifted this product by Gloss Angeles Confidential for an honest review & WOW GUYS this product has improved my hair so much !!! As someone who isn’t a natural blonde and gets blonde balayage this product has completely savedddd me !!! I have long thick hair and struggle to keep my hair without split ends , or frizz especially after blow drying. Heatbounce has helped me tame my frizz , help with my split ends and prevent them as well as protect my hair with all the heat I use on my hair. I am not a fan of products with a strong scent and heat bounce has the perfect FRESH scent !!! I also struggle with making sure I don’t make my hair even more heavy with products and this was very light weight on my hair. I feel like it’s super important to follow directions as stated on the bottle or website. For reference I use it post shower / towel dried hair for best results before blow drying and applying heat. It helped me have better control of the product and my blow out lasted longer. I also used it on dry hair before styling but I let it dry before applying heat. I immediately noticed my hair looked less damage , and much softer. Took it to my beach vacation and it literally made a huge difference from all the post pool hair and sun exposure! So if you want soft less damaged / less split ends and bouncy hair bestieeee look no further !!!!! Loveeeee k18 , truly can’t live without it and worth every penny if you struggle with damaged hair or on a healthy hair journey !!!

  • Patricia H.
    Verified Reviewer
    Reviewing
    HeatBounce conditioning heat protectant 4oz
    I recommend this product
    Age 35 - 44
    Hair Concern Frizz, Dryness, Heat damage
    Hair Type Fine/Thin, Straight/Wavy
    My Results Less Frizz, Shinier Hair, Smoother Hair, Less Breakage
    Rated 5 out of 5 stars
    Yesterday
    Most Weightless Heat Protection

    I was gifted this product by Gloss Angeles Confidential for an honest review and boy did it not disappoint. I honestly wanted to not like it and I’ll tell you why I feel that anytime anyone sees K18 product you think oh my goodness it’s gonna make a hole in my pockets because the products are pricey but also they’re so amazing and they work every time so I had no idea why I thought this wouldn’t work But it did and it is amazing on my hair. I have another go to product and honestly, this will be my new go to product because it just leaves your hair not only frizz free but so super soft. The conditioning factor really does condition the hair follicles because it feels so weightless even on the roots down to the ends. I have highlights in my hair so all the bleached parts have always felt so dry. after using this for a couple of weeks. My hair is so soft after using a blow dryer or any other hot tool.. no other heat protectant has been able to do this for me so this one is 10 out of 10!

  • Idalys O.
    Verified Reviewer
    Reviewing
    HeatBounce conditioning heat protectant 4oz
    I recommend this product
    Age 25 - 34
    Hair Concern Chemical damage, Heat damage, Frizz, Fragile/brittle hair, Dryness
    Hair Type Straight/Wavy
    My Results Less Frizz, Bouncy Hair, Stronger Hair, Less Breakage, Shinier Hair
    Rated 5 out of 5 stars
    Yesterday
    Dull hair to an wake and volumizing feeling.

    I was gifted this product through Gloss Angeles Confidential and WOW HeatBounce by K18 is officially my hair’s new ride-or-die! 🙌 I’ve been blow-drying and flat-ironing more than usual (hello content creation and mom life), and this gem actually made my hair feel healthier after styling. It gives that soft, bouncy finish without the greasy buildup or weight. My ends don’t feel crispy, my shine is back, and the protection up to 450°F is no joke. Bonus? It smells luxe. Like salon day at home. If you love your hair but also love your hot tools, this is your secret weapon!

    K Profile picture for K18Hair
    K18Hair
    Yesterday

    Amazing that your ends feel smooth instead of crispy and your shine is back! Thanks for the wonderful 5-star review!

  • Tara
    Verified Reviewer
    Reviewing
    HeatBounce conditioning heat protectant 4oz
    I recommend this product
    Age 35 - 44
    Hair Concern Frizz, Color-care, Dryness, Heat damage
    Hair Type Fine/Thin
    My Results Less Frizz, Smoother Hair, Shinier Hair
    Rated 5 out of 5 stars
    Yesterday
    Love this for fine hair!

    I recently started using K18 Heat Bounce and have been loving the results! I’ve mostly used it by applying to damp hair before blow drying and it’s made my hair soft, hydrated and way less tangled and with less frizz than I typically experience. I have fine, color treated hair. I feel like it also helped my hair dry faster and gave it a bit of shine as well - without weighing it down AT ALL. Loving this as a new go to product in my hair routine and the spray application is really convenient compared to some other heat protectants I’ve tried. I was gifted this product by Gloss Angeles Confidential.

    K Profile picture for K18Hair
    K18Hair
    Yesterday

    So happy to hear HeatBounce is the perfect addition to your routine, Tara! Thanks for the wonderful 5-star review!

  • Megha
    Reviewing
    HeatBounce conditioning heat protectant 4oz
    I recommend this product
    Age 25 - 34
    Hair Concern Dryness, Frizz, Oily hair/scalp, Fragile/brittle hair
    Hair Type Medium Density
    My Results Visible Difference, Bouncy Hair, Smoother Hair, Soft Touchable Hair, Cleaner, fresher hair
    Rated 5 out of 5 stars
    Yesterday
    Leaves my hair looking healthy & hydrated!

    I’m seriously impressed. It feels super lightweight in the hair but still gives that smooth, salon-like finish. I love that it conditions while protecting, which is a big deal for me since I style my hair often. It claims to protect up to 450°F, and after blow drying and flat ironing, my strands didn’t feel dry or damaged at all. My hair stayed soft, shiny, and frizz-free without feeling greasy or heavy. Plus, it smells amazing, which makes the experience even better. It’s great knowing I’m not just styling but actually treating my hair too. Definitely one of the best heat protectants I’ve tried in a while. Highly recommend. This product was gifted by @k18biomimetichairscience in exchange for my honest review.

    K Profile picture for K18Hair
    K18Hair
    Yesterday

    So happy to hear HeatBounce is giving you that perfect lightweight protection while leaving your hair healthy and hydrated, Megha! Thanks for the wonderful 5-star review!

Pro Distribution Partners

Paramount Beauty Supply
USA
Salon Services Pro
USA
Salon Service Group
USA
Salonwax Pro
USA
Premier Beauty Supply
USA
Launching Soon
Ozdare - Australia
AU
 
Launching Soon
American Crew Ltd. - New Zealand
NZ
 
Launching Soon
PlayGround - Hong Kong
HK
 
Launching Soon
Session Map - Sweden
SE
 
Launching Soon
Cyprus
CY
 
Launching Soon
Belgium
BE
 
Coming Early 2021
Canada
CA
 
Coming Early 2021
Czech Republic
CZ
 
Coming Early 2021
Finland
FI
 
Coming Early 2021
France
FR
 
Coming Early 2021
Germany
DE
 
Coming Early 2021
Ireland
IR
 
Coming Early 2021
Italy
IT
 
Coming Early 2021
Netherlands
NL
 
Coming Early 2021
Norway
NO
 
Coming Early 2021
Singapore
SG
 
Coming Early 2021
Taiwan
TW
 
Coming Early 2021
UK
UK
 
Coming Early 2021
thank you for visiting!

You are now being redirected to an official partner website for this region where you can shop K18 Hair.

Changed your mind? Go back.

00:00
subscribe + save 15%
healthy hair on your schedule
Pick your K18 + how often you want to replen.
We’ll send you a heads up before every delivery.
You’re in charge. Change the way you pay, skip a shipment, or cancel anytime.
Blackfire Tracking